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《Journal of Shaanxi Normal University(Natural Science Edition)》 2008-01
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Influences of the gain and absorption spoilage effect of medium on Y-squeezing of 2MQES light-field

XUE Hong1,2,SHI Wei1,LI Wang2(1 College of Science,Xi′an University of Technology,Xi′an 710048,Shaanxi,China;2 Department of Physics,Weinan Teachers University,Weinan 714000,Shaanxi,China)  
The 2MQES(or Two state-superposition multimode quantum entanglement state) light-field |Ψ(2)MF(αj)〉q along Z direction spreading in the gain medium and absorption medium is constructed.The multimode squeezed state theory is used to research the effect of the generalized nonlinear equal-power N-power Y-squeezing of 2MQES light-field,the influences of the gain and absorption spoilage effect of medium upon the generalized nonlinear equal-power N-power Y-squeezing of 2MQES light-field are analyzed in detail.It is found that,under the condition of the gain parameter.αj0,both the generalized electric-field component and the generalized magnetic-field component of state |Ψ(2)MF(αj)〉q can present a N-power Y-squeezing effect,and when αj is increase,both the squeezed amplitude and the squeezed intensity of the N-power Y-squeezing will diminish.Under the condition of the absorption spoilage coefficient αj0,both the generalized electric-field component and the generalized magnetic-field component of state |Ψ(2)MF(αj)〉q can present a N-power Y-squeezing effect,while |αj| is increase,both the squeezed amplitude and the squeezed intensity of the N-power Y-squeezing will increase.When the absorption effect is increasingly strong,both the squeezed amplitude and the squeezed intensity are increasingly big.It is shows that absorption medium is advantageous to squeezing of multimode quantum superposition state light-field.
【Fund】: 陕西省自然科学基金资助项目(2004A19);; 陕西省教育厅科研基金资助项目(02JK191)
【CateGory Index】: O431.2
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